1 files changed, 2 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 3f758c7..22e1a0b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1293,6 +1293,8 @@ munmap_back:
 		pgoff = vma->vm_pgoff;
 		vm_flags = vma->vm_flags;
 	} else if (vm_flags & VM_SHARED) {
+		if (unlikely(vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
+			goto free_vma;
 		error = shmem_zero_setup(vma);
 		if (error)
 			goto free_vma;